Caterpillar Cat 990H Wheel Loader (Prefix BWX) Service Repair Manual Instant Download.pdf

Product: WHEEL LOADER
Model: 990H WHEEL LOADER BWX
Configuration: 990H Wheel Loader BWX00001-UP (MACHINE) POWERED BY C27 Engine
Disassembly and Assembly
844H Wheel Dozer and 990H Wheel Loader Power Train
Media Number -RENR8812-02 Publication Date -01/08/2018 Date Updated -15/08/2018
i02499644
Input Transfer Gears - Disassemble
SMCS - 3159-015-IV
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A
1H-3112 Bearing Cup Puller 1
8B-7548 Push-Puller Tool Gp 1
B
8B-7551 Bearing Puller 1
8H-0684 Ratchet Wrench 1
8B-7560 Step Plate 1
C
8B-7551 Bearing Puller 1
8H-0684 Ratchet Wrench 1
8B-7560 Step Plate 1
1P-0510 Driver Gp 1
Start By:
a. Separate the transfer gears from the transmission. Refer to Disassembly and Assembly,
"Transmission from Transfer Gears - Separate".
1. Place the input transfer gears on suitable blocks.
1/8
990H Wheel Loader BWX00001-UP (MACHINE) POWERED BY C27 Engine(SEBP...
2021/11/25
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

Illustration 1 g00862308
2. Remove bolts (1) from manifold (2).
Note: Bolts (1) can be used as forcing screws in order to loosen manifold (2).
3. Remove manifold (2).
4. Remove O-ring seal (3) and O-ring seal (4) from manifold (2).
2/8
2021/11/25

5. Remove bolts (5) from input bearing cage (6).
Note: Bolts (5) can be used as forcing screws in order to loosen input bearing cage (6).
6. Remove input bearing cage (6) from the transfer case assembly.
Typical Example
7. Remove O-ring seal (7) from the bearing cage.
8. Use Tooling (A) in order to remove bearing cup (8) from the bearing cage.
3/8
2021/11/25

9. Remove lip seal (9) from input bearing cage (6).
10. Remove input gear assembly (10) from the transfer case.
4/8
2021/11/25

11. Use Tooling (B) in order to remove bearing cones (11) from input gear assembly (10).
12. Use Tooling (A) in order to remove bearing cup (12).
13. Remove shim pack (13) from the transfer case assembly.
5/8
2021/11/25

14. Turn over the transfer case assembly, as shown.
15. Remove bolts (14) from output bearing cage (15).
Note: Use bolts (14) as forcing screws, if necessary.
16. Use Tooling (A) in order to remove bearing cup (16) from output bearing cage (15).
17. Remove shim pack (17) and output gear assembly (18) from transfer case assembly.
6/8
2021/11/25

Typical Example
18. Use Tooling (C) in order to remove bearing cones (19) from output gear assembly (18).
19. Remove tube (20) and dowel (21) from the transfer case assembly.
20. Use Tooling (A) in order to remove bearing cup (22).
7/8
2021/11/25

i02499645
Input Transfer Gears - Assemble
SMCS - 3159-016-IV
Assembly Procedure
Table 1
Required Tools
A 8T-5096 Dial Indicator Group 1
B 1P-0520 Driver Gp 1
1. Place the transfer case in a horizontal position.
2. Lower the temperature of bearing cup (22). Install bearing cup (22) in the transfer case.
Note: The bearing cups must be seated in the transfer case.
1/7
2021/11/25

3. Install tube (20) and dowel (21) into the transfer case assembly.
4. Raise the temperature of bearing cones (19) to a maximum temperature of 135 °C (275 °F).
Install the bearings on output transfer gear (18).
Note: The bearing cones must be seated on the gear.
5. Install output transfer gear (18) and shim pack (17) in the transfer case assembly.
2/7
2021/11/25

6. Lower the temperature of bearing cup (16) and install the bearing cup in the output bearing
cage. The bearing cup (16) must be seated in output bearing cage (15).
7. The following steps are used in order to set the bearing end play for the lower transfer gear.
a. With the axis of the output gear in a vertical position, install output bearing cage (15)
in the transfer case assembly. Make sure that the bearing cage does not bind in the
transfer case assembly.
b. Install bolts (14). Tighten the bolts evenly to torque of 47 ± 9 N·m (35 ± 7 lb ft).
Rotate the gear for a minimum of three revolutions or rotate the gear until the rolling
resistance of the gear diminishes to a steady level.
Typical Example
c. Mount Tooling (A) on the input transfer gear housing, as shown. Measure the end
play of the gear assembly by lifting on the gear assembly.
Note: The desired end play for the gear is 0.152 mm (.0060 inch). The maximum end
play for the gear is 0.203 mm (.0080 inch). The end play of the gear must be
measured with a dial indicator in order to determine the correct gear end play.
3/7
2021/11/25

d. If the end play is not within the correct range, perform Steps 7.a through 7.c again.
Add or remove shims in order to achieve the correct end play.
8. Turn over the transfer case assembly.
9. Lower the temperature of bearing cup (12) and install the bearing cup in the transfer case
assembly. Use the appropriate equipment in order to handle the bearing cup. The bearing
cup (12) must be seated in transfer case assembly.
10. Install shim pack (13).
11. Raise the temperature of bearing cones (11) to a maximum temperature of 135 °C (275°F).
Install the bearing cones on input transfer gear (10), as shown. The bearing cones must be
seated on the gear properly.
4/7
2021/11/25

12. Install input gear (10) into the transfer case assembly.
13. Install lip seal (9) into input bearing cage (6). Install the seal so that the lip is facing toward
the outside of the input bearing cage. Install the seal until the seal makes contact with the
counterbore in the bearing cage.
5/7
2021/11/25

14. Lower the temperature of bearing cup (8) and install the bearing cup in the input bearing
cage. Use the appropriate equipment in order to handle the bearing cup. The bearing cup (8)
must be seated in input bearing cage (6).
15. Install O-ring seal (7) in input bearing cage.
16. With the axis of the input gear in a vertical position, install input bearing cage (6) in the
transfer case assembly. Make sure that the bearing cage does not bind in the transfer case
assembly.
17. Install bolts (5). Tighten the bolts evenly to torque of 47 ± 9 N·m (35 ± 7 lb ft).
18. Rotate the shaft while tapping the shaft lightly with a mallet, for a minimum of three
revolutions or until the rolling resistance of the gear diminishes to a steady level.
Typical Example
19. Attach Tooling (A) on the transfer case assembly, as shown.
20. Measure the end play of the gear assembly by lifting on the gear assembly.
Note: The desired end play for the gear is 0.152 mm (.0060 inch). The maximum end play
for the gear is 0.203 mm (.0080 inch). The end play of the gear must be measured with a
dial indicator in order to determine the correct gear end play.
6/7
2021/11/25

21. If the end play is not within the correct range, repeat Steps 16 through 20. Add or remove
shims in order to achieve the correct end play.
22. Install the O-ring seal (3) and O-ring seal (4) to manifold (2).
23. Use bolts (1) in order to install manifold (2) on the transfer case assembly.
End By:
a. Connect the transfer gears to the transmission. Refer to Disassembly and Assembly,
"Transmission to Transfer Gears - Connect".
7/7
2021/11/25

i03454616
Output Transfer Gears - Disassemble
SMCS - 3075-015-OJ
Disassembly Procedure
Table 1
Required Tools
A 1P-7409 Eyebolt 1
B 138-7575 Link Bracket 2
C 1P-0520 Driver Gp 1
D 5J-0490 Bolt 2
Start By:
a. Remove the transfer gears. Refer to Disassembly and Assembly, "Transmission from
Transfer Gears - Separate" for the machine that is being serviced.
b. Remove the magnetic filter screen tube assembly. Refer to Disassembly and Assembly,
"Magnetic Filter Screen and Housing - Remove".
1/19
2021/11/25

1. Remove bolt (1), retainer (2), and the O-ring seal from the transfer shaft.
2. Remove yoke (3) from transfer shaft (4).
2/19
2021/11/25

3. Remove bolts (5) from bearing cage (6).
4. Use Tooling (D) in order to separate bearing cage (6) from the transfer gear case. Tighten
Tooling (D) evenly in order to separate the bearing cage from the transfer gear case
assembly.
5. Remove lip seal (7) from bearing cage (6).
3/19
2021/11/25

6. Remove ring (8), the race, and roller assembly (9) from bearing cage (6).
7. Remove cup plug (10) from transfer gear case assembly (11).
8. Remove tube (12) from transfer gear case assembly (11), if necessary.
9. Position transfer gear case assembly (11), as shown.
4/19
2021/11/25

10. Remove bolt (13), retainer (14), and the seal.
11. Remove yoke (15) from transfer shaft (4).
12. Remove bolts (16) from output bearing cage assembly (17).
5/19
2021/11/25

13. Use Tooling (D) in order to separate output bearing cage (17) from the transfer gear case.
Tighten Tooling (D) evenly in order to separate output bearing cage (17) from the transfer
gear case.
14. Install Tooling (A) onto transfer shaft (4).
15. Use Tooling (A) and a suitable lifting device in order to remove output bearing cage
assembly (17) from transfer gear case assembly (11). The weight of bearing cage assembly
(17) is 254 kg (560 lb).
16. Turn over the output bearing cage assembly.
17. Remove bolts (18A) from output bearing cage assembly (17).
6/19
2021/11/25

18. Position output bearing cage assembly (17) on a suitable press.
19. Press transfer shaft (4) from output bearing cage assembly (17), as shown.
20. Press transfer shaft (4) through output gear (18), as shown. The weight of transfer shaft (4)
is approximately 68 kg (150 lb). The weight of output gear (18) is approximately 79 kg
(175 lb).
7/19
2021/11/25

21. Remove bearing cup (19) and lip seal (20) from output bearing cage assembly (17).
22. Turn output bearing cage assembly (17), as shown.
23. Remove O-ring seal (21).
24. Remove bearing race (22) from transfer shaft (4).
8/19
2021/11/25

25. Remove bearing cones (26), bearing cup (25), retainer (24), spacer (23), and output gear
(18) from transfer shaft (4).
26. Remove O-ring seal (27) from cover (28).
9/19
2021/11/25

27. Remove bolts (30) and locks (29) from input bearing cage (31).
28. Install Tooling (D) in input bearing cage (31). Tighten Tooling (D) evenly in order to
separate the input bearing cage from the transfer gear case assembly.
29. Remove shim pack (32) from cover (28).
30. Remove bearing cup (33) from input bearing cage (31).
10/19
990H Wheel Loader BWX00001-UP (MACHINE) POWERED BY C27 Engine(SE...
2021/11/25

31. Remove bolts (34) from bearing cage assembly (36).
32. Remove the bearing cage assembly from cover (28).
Note: Remove the secondary steering pump in order to remove bearing cage assembly (36),
if equipped.
33. Remove shim pack (35) from bearing cage assembly (36).
34. Remove O-ring seal (37) and bearing cup (38) from bearing cage assembly (36).
35. Loosen bolts (39). Do not remove bolts (39) at this time.
11/19
2021/11/25

36. Strike bolts (39) or strike the case near the bearing assembly with a dead blow hammer in
order to loosen lock assembly (44). Do not strike cover (40).
Note: Lock assembly (44) must be loosened before removing cover (40). Removing cover
(40) before lock assembly (44) is loosened may result in personal injury.
37. Remove bolts (39).
38. Remove cover (40) from the transfer gear case assembly.
12/19
2021/11/25

39. Remove O-ring seals (41) and O-ring seal (42) from cover (40).
40. Remove bolts (43) from cover (28).
41. Remove one-half of lock assembly (44).
13/19
2021/11/25

Suggest:
If the above button click is invalid.
Please download this document
first, and then click the above link
to download the complete manual.
Thank you so much for reading

42. Install Tooling (D) in cover (28). Tighten Tooling (D) evenly in order to separate the cover
from the transfer gear case assembly.
43. Use Tooling (B) and a suitable lifting device in order to remove cover (28) from the transfer
gear case assembly. The weight of cover (28) is approximately 82 kg (180 lb).
44. Attach a suitable lifting device to a flat piece of steel bar stock, and place the bar stock
under the bottom of input gear (45).
45. Lift input gear (45) from the transfer gear case assembly. The weight of input gear (45) is
approximately 50 kg (110 lb).
14/19
2021/11/25

Caterpillar Cat 990H Wheel Loader (Prefix BWX) Service Repair Manual Instant Download.pdf

Recommended

Recommended

More Related Content

Similar to Caterpillar Cat 990H Wheel Loader (Prefix BWX) Service Repair Manual Instant Download.pdf

Similar to Caterpillar Cat 990H Wheel Loader (Prefix BWX) Service Repair Manual Instant Download.pdf (20)

More from fujskekkdm8ik

More from fujskekkdm8ik (18)

Recently uploaded

Recently uploaded (20)

Caterpillar Cat 990H Wheel Loader (Prefix BWX) Service Repair Manual Instant Download.pdf